233 



giore, ad extremitatem obtuse rotundato ; postico trancato-cunei- 

 formi ; ligamento prominentc ; costa umbonali subobsoleta ; den- 

 tibus ut in JDonacind. 



Oval-oblong, solid, slightly inequilateral, compressed, somewhat 

 glossy, with very dose concentric striae, wliicli are subimbricated 

 in front, and raised beliind ; wliite or pale pink, with numerous 

 rosy somewhat interrupted rays ; ventral edge subretuse in the mid- 

 dle ; dorsal edges nearly straight, the front one scarcely, the liinder 

 one moderately sloping ; ligament prominent ; anterior side rather 

 the longer, and obtusely rounded at its termination ; posterior side 

 of a truncated wedge-shape ; umbonal ridge not prominent ; inside 

 paler than the exterior but usually tinged with rose-colour ; teeth 

 as in Donacina. 



Mus. Cuming, Walton. 



23. Tellina lineata (pi. Ivi. f. 35, 36. and pi. Ivii. f. 46, 47.) 

 Turton, Conch, Diet. p. 168. f. 16 ; Turt. Biv. Brit. p. 99. t. 7. f. 1 . 

 T. Brasiliana Lam-, no. 46; Hani. Des. Cat. p. 70. sup. t. 9. f. 3. 

 T. striata MonL Test. Brit. p. 60. t. 27. f. 2. 



T. testa ovata,solida, convexa, concentrice et confertissime striata; 

 margiue ventrali medio subrecto ; dorsaH antice magis minusve 

 convexo et paululum declivi, postice umbones versus subretuso, 

 deinde convexo et declivi ; latere antico longiore, ad extremitatem 

 rotundato ; extremitate postica cuneiformi; hgamento prominente; 

 flexura costaque umbonali satis conspicuis; dentibus lateraUbus 

 validis, subsequidistantibus. 



Var. a, Testa sordide albida, umbonibus nonnunquam aurantiis, 

 radioque brevi obhquo roseo antice ornatis. Var. b, Penitus Can- 

 dida, Yar, c, Ovato-oblonga, laevigata, nitida, albido-rosea, radio 

 obli([uo ut in var. a ; intus rosea. 



More or less ovate soHd and convex, with concentric minute 

 crowded striae ; the ventral margin nearly straight in the middle ; an- 

 terior side the longer (sometimes scarcely so,) its extremity rounded, 

 its dorsal edge but slightly sloping ; posterior extremity wedge- 

 shaped, the ligamental edge, which near the beaks is somewhat re- 

 tuse, becoming convex at its termination ; fold and flexure incon- 

 spicuous ; lateral teeth strong, and subequidistant. 



Var. a, Pale, wdth a short oblique anterior crimson ray at the 

 umbones, wliich are sometimes tmged with orange. Var. b, En- 

 tirely wliite. Var. c, The ray as in var. a, but the shape more 

 elongated, and the surface pink smooth and glossy ; inside rosy. 



Britain (?), West Indies, Florida, and Brazil. 



